Title :
Impact of clipping distortions on hybrid AM-VSB/16 QAM CATV systems
Author :
Braye, G. ; Froidure, J.G. ; Blondel, M.
Author_Institution :
Service d´´Electromagn. & Telecommun., Faculte Polytech. de Mons, Belgium
Abstract :
Hybrid multichannel AM-VSB/QAM subcarrier multiplexed (SCM) systems seem to be a promising method for fibre optic video transmission. Hybrid analog/digital CATV systems have the advantage of compatibility with existing TV equipment and are able to provide new digital services such as VOD. We examine the clipping effects on AM-VSB/QAM CATV systems performance. For AM-VSB channels, the CSO and CTB have been computed and measured. The effect of QAM channels on CSO and CTB has been examined. For QAM channels, clipping induced BER has been computed. We also determine the optimum optical modulation depths (signal power) for QAM and AM-VSB channels when clipping occurs
Keywords :
amplitude modulation; cable television; digital television; error statistics; interactive television; interactive video; optical fibre networks; optical modulation; optical noise; quadrature amplitude modulation; subcarrier multiplexing; telecommunication channels; AM-VSB channels; CSO; CTB; QAM channels; TV equipment; VOD; clipping distortions; clipping effects; clipping induced BER; compatibility; digital services; fibre optic video transmission; hybrid AM-VSB/16 QAM CATV systems; hybrid analog/digital CATV systems; hybrid multichannel SCM systems; optimum optical modulation depths; signal power; subcarrier multiplexed systems; system performance; Bit error rate; Fiber optics; Optical computing; Optical distortion; Optical modulation; Optical noise; Power lasers; Quadrature amplitude modulation; TV equipment; Tellurium;
Conference_Titel :
Electrotechnical Conference, 1996. MELECON '96., 8th Mediterranean
Conference_Location :
Bari
Print_ISBN :
0-7803-3109-5
DOI :
10.1109/MELCON.1996.551384
